Multiple desktops not being saved at logoff

[Rob Clack <rob@theclacks.org.uk>]

I'm using KDE 3.2.3 under Debian 3 and having difficulty getting it to 
remember that I always want 4 virtual desktops.  That was the default at 
installation, but somewhere down the line I did something and now 
whenever I log on I only get the one desktop.  So I fire up the Control 
Center (3.2.2) and set it to 4, press Apply and I have my 4 virtual 
desktops.  Then when I log out, I choose Save Settings from the logout 
dialogue.

Sadly, when I boot the computer next time, KDE has forgotten all about 
my multiple desktops and just gives me the one.

I'd really like to be able to set this and forget it, but can't find out 
how.  Must be possible, since 4 is the default, but so far I get 
nowhere, and searching of archives etc has yielded nothing helpful.

Hope someone knows what I need to do.
Thanks
Rob Clack